Blowout preventers and methods of use

Details Blowout preventers and methods of use Blowout preventers and methods of use

2008-05-06

2008-05-06

Bagnell, David J. (Department: 3676)

Wells

Processes

Perforating, weakening, bending or separating pipe at an...

C166S055000, C083S051000, C083S054000

Reexamination Certificate

active

07367396

ABSTRACT:
Methods and apparatuses for severing a wellbore tubular, the apparatus, in certain aspects, including: a first member movable toward a tubular to be severed; a second member with a second blade disposed opposite to the first member and movable toward the tubular; a first blade on the first member having a projection projecting from a center of a blade body with point structure on the projection for puncturing the tubular and cutting surfaces on the projection for cutting the tubular; and cutting surfaces, as needed, on the blade body adjacent the projection for cutting the tubular.

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